Viessmann CA

Critical

Vitocal — Primary-circuit protection – compressor off.

Viessmann CA: Primary-circuit protection – compressor off. This fault typically halts operation and needs immediate attention.

Possible causes

Pressure/frost/flow monitor of primary tripped.
Bridge X3.9/X3.8 missing or primary pump faulty.

Check steps

Check safety elements at X3.8/X3.9.
Check primary circuit & pump, replace if needed.

Affected parts

Druckwächter
Frostschutzwächter
Primärpumpe

Safety note

Live terminals – de-energise.

Source: Viessmann resmi servis kılavuzu — Serviceanleitung WO1C, section 'CA Schutzeinricht. Primär' (p.107-108): 'Verdichter schaltet aus. Ursache: Druckwächter oder Frostschutzwächter Primärkreis haben ausgelöst / Spannungsversorgung Ventilator fehlerhaft / Ventilator blockiert oder defekt / Feuchteanbauschalter hat au…

Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.

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